With one bottle of drinking water and four hours of sunlight, MIT chemist Dan Nocera claims that he can produce 30 KWh of electricity {...}

Using the electricity generated from a 30-square-meter photovoltaic array, Nocera’s cobalt-phosphate catalyst converts water and carbon dioxide into hydrogen and oxygen. The process is similar to organic photosynthesis, except that in nature, plants create energy in the form of sugars instead of hydrogen.
{...}
“Where Sun Catalytix is headed is that your house would become its own power station and gas station,” he said in the video. “All of a sudden, you don’t need any more energy from anybody else because you’re using the sun at your house.”

Is this being needlessly complicated by the talk of solar and photosynthesis? Wouldn't it make sense to just say a new catalyst has been discovered for a new method of electrolysis? Why do they imply that a couple PV panels on your roof will provide all the energy you need for your house and car?

Nocera’s cobalt-phosphate catalyst converts water and carbon dioxide into hydrogen and oxygen. The process is similar to organic photosynthesis, except that in nature, plants create energy in the form of sugars instead of hydrogen.

Other than them saying it takes water & CO2, I don't see how this works. If you are creating hydrogen by electrolysis then all you need is water & electricity. A catalyst in the water if you want to speed the reaction up. Chemically speaking, where does the CO2 fit in? I think they just threw that in to get media attention.